The summoner name or tag is incorrect
ranger #1895
SILVER III
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Match History for Patch: 16.10.1
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Champion Stats for Patch: 16.10.1
Champion Mastery
lvl: 12
108,315
lvl: 10
81,459
lvl: 6
41,429
lvl: 6
39,339
lvl: 5
24,554
lvl: 4
16,438
lvl: 4
16,206
lvl: 4
13,694
lvl: 4
12,821
lvl: 4
12,634
lvl: 3
8,448
lvl: 3
7,762